Characterization and electrochemical behaviors of honeycomb-patterned poly(N-vinylcarbazole)/polystyrene composite films

Abstract

Poly(N-vinylcarbazole)/polystyrene composites were prepared through simple radical polymerization of N-vinylcarbazole in the presence of polystyrene. Honeycomb-patterned composite thin films were fabricated by casting the composite solutions under humid conditions. The scanning electron microscopy (SEM) images of the resulting honeycomb pattern on the composites show a higher regular structure compared to those of films prepared from the poly(N-vinylcarbazole) homopolymer. The pressure-area isotherms and photoelectrochemical behaviors of the patterned films were also observed. The photoconductivity of the patterned thin films increased with increasing poly(N-vinylcarbazole) concentration. This enhancement is attributed to the effects of the honeycomb structures and the charge transfer across the donor/acceptor hybrid interface in the composite films.

Influence of membrane structure on the operating current densities of non-aqueous redox flow batteries: Organic–inorganic composite membranes based on a semi-interpenetrating polymer network

“…In terms of the spectra of the PVdF/PGMA/Si AEM, the peak at 1722 cm À1 is associated with the stretching of C]O groups, thereby supporting the existence of PGMA; the peak at 1644 cm À1 in the PVdF/P4VP/Si AEM is estimated as a quaternization-induced shift in peak from the 1600 cm À1 peak of the pure P4VP [18]. For the PVdF/PNVC/Si AEM, the C]C stretching modes in the aromatic component at 1598 cm À1 , a ring vibration of NVC at 1483 cm À1 , and a ring deformation of the substituted aromatic structure in PNVC at 748 and 723 cm À1 occur because of structural characterization [29].…”

Synthesis and Anticorrosive Properties of Novel PVK-ZrO₂Nano Composite Coatings on Steel-Substrate

“…The characteristic absorption band corresponding to ring vibration of NVC moiety was found to be 1448 cm −1 [33,34]. The peaks at 1635 and 3044 cm group [33,34]. In addition, the band around 510 cm…”

“…PVKZrO 2 composite IR spectrum is almost identical to that of the PVK with similar peaks with a slight shift in the stretching bands, which indicates that some interaction exists between PVK and nano-ZrO 2 . The main characteristic peaks of the PVK backbone are assigned as follows: 1222, 1450 and 1478 cm −1 are attributed to C-C stretching of the vinyl carbazole and vinylidene groups respectively [32,33]. The characteristic absorption band corresponding to ring vibration of NVC moiety was found to be 1448 cm −1 [33,34].…”

“…The main characteristic peaks of the PVK backbone are assigned as follows: 1222, 1450 and 1478 cm −1 are attributed to C-C stretching of the vinyl carbazole and vinylidene groups respectively [32,33]. The characteristic absorption band corresponding to ring vibration of NVC moiety was found to be 1448 cm −1 [33,34]. The peaks at 1635 and 3044 cm group [33,34].…”

Fabrication and characterization of honeycomb-patterned film from poly(ɛ-caprolactone)/poly((R)-3-hydroxybutyric acid)/reduced graphene oxide composite

“…26 In this method, the substrate is completely dispersed in organic solvents, such as chloroform, and films are then fabricated by casting these solutions under humid conditions. 27 Conducting honeycomb-patterned thin films of biocompatible polymer composites are suitable candidates for semiconducting biomaterials for applications.…”